About the Celestron C90 MAK Spotting Scope...
The Celestron Spotting Scope Maksutov optical design is recognized for being a portable design that is easy to use and has a variety of applications, making it an excellent choice for both terrestrial and astronomical usage. This Celestron C90 Mak Spotting Scope has excellent optics with razor sharp images over a wide field.
Celestron C90 MAK Spotting Scope Features...
- Multi Coated Optics
- Maksutov-Cassegrain Optical Design
- Compact and Portable Design
- Erect Image System for Terrestrial and Astronomical Use
- Built-in T-Adapter threads for Ease of Adapting SLR Cameras
- Comes with 32 mm Eyepiece, 45 Degree Erect Image
Diagonal and 8x21 Erect Image Finderscope
- Backpack Made of Nylon
- Limited Lifetime Warranty
"The C90 Mak is a fantastic grab-n-go scope for astronomy. The scope comes with a factory installed vixen style mount for astro mounts, but is also tapped for use with a photo tripod providing the ultimate in flexibility. The unit provides tack sharp images and is great for lunar and planetary viewing. For astro use, I replaced the 45 degree prism with a 90 degree optional star diagonal to maximize performance. The scope is so light that when mounted to my photo tripod and video head, I can carry the whole set up outside in one trip. 90mm aperture provides enough light gathering for planetary and lunar viewing while keeping cool down time to a minimum."
Celestron C90 MAK Spotting Scope Specifications...
Optical Design: Maksutov-Cassegrain
Aperture (mm): 90 mm (3.54 in)
Focal Length (mm): 1250 mm (49 in)
Focal Ratio: 14
Angle: 0 or 45 degrees
Eyepiece 1 (mm): 32 mm (1.26 in)
Magnification 1: 39 x
Carrying Case: Backpack made of nylon
Highest Useful Magnification: 213 x
Lowest Useful Magnification: 13 x
Limiting Stellar Magnitude: 12.3
Resolution (Rayleigh): 1.55 arc seconds
Resolution (Dawes): 1.29 arc seconds
Light Gathering Power (Compared to human eye): 165 x
Angular Field of View (deg): 1.3 degrees
Linear Field of View (@1000 yds): 68 ft (21 m)
Linear Field of View (@1000 m): 23 m (75 ft)
Eye Relief (mm): 20 mm (0.79 in)
Near Focus (Binoculars): 15 ft (4.57 m)
Optical Coatings: Multi-Coated
Optical Tube Length: 16 in (406 mm)
Weight (lbs): 5 lbs (2.27 kg)
Camera Adaptable: Optional T-Adapter
Tripod Adaptable: YesCelestron Product Number: 52268